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 <h1 class="title">ReflectionType 类</h1>
 

 <div class="partintro"><p class="verinfo">(PHP 7, PHP 8)</p>


  <div class="section" id="reflectiontype.intro">
   <h2 class="title">简介</h2>
   <p class="para">
    <span class="classname"><strong class="classname">ReflectionType</strong></span> 类报告有关函数的参数/返回类型以及类的属性类型的信息。Reflection
    扩展声明了以下子类型：
    <ul class="simplelist">
     <li class="member"><span class="classname"><a href="class.reflectionnamedtype.html" class="classname">ReflectionNamedType</a></span>（自 PHP 7.1.0 起）</li>
     <li class="member"><span class="classname"><a href="class.reflectionuniontype.html" class="classname">ReflectionUnionType</a></span>（自 PHP 8.0.0 起）</li>
     <li class="member"><span class="classname"><a href="class.reflectionintersectiontype.html" class="classname">ReflectionIntersectionType</a></span>（自 PHP 8.1.0 起）</li>
    </ul>
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  <div class="section" id="reflectiontype.synopsis">
   <h2 class="title">类摘要</h2>


   <div class="classsynopsis">
    <div class="ooclass">
     
    </div>

    <div class="classsynopsisinfo">
     <span class="ooclass">
      <span class="modifier">abstract</span>
      <span class="modifier">class</span> <strong class="classname">ReflectionType</strong>
     </span>

     <span class="oointerface"><span class="modifier">implements</span> 
       <a href="class.stringable.html" class="interfacename">Stringable</a></span> {</div>

    <div class="classsynopsisinfo classsynopsisinfo_comment">/* 方法 */</div>
    <div class="methodsynopsis dc-description">
   <span class="modifier">public</span> <span class="methodname"><a href="reflectiontype.allowsnull.html" class="methodname">allowsNull</a></span>(): <span class="type">bool</span></div>
<div class="methodsynopsis dc-description"><span class="modifier">public</span> <span class="methodname"><a href="reflectiontype.tostring.html" class="methodname">__toString</a></span>(): <span class="type">string</span></div>

   }</div>

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   <h2 class="title">更新日志</h2>
   <p class="para">
    <table class="doctable informaltable">
     
      <thead>
       <tr>
        <th>版本</th>
        <th>说明</th>
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      </thead>

      <tbody class="tbody">
       <tr>
        <td>8.0.0</td>
        <td>
         <span class="classname"><strong class="classname">ReflectionType</strong></span> 已成为抽象类，<span class="function"><strong>ReflectionType::isBuiltin()</strong></span>
         已移至 <span class="function"><a href="reflectionnamedtype.isbuiltin.html" class="function">ReflectionNamedType::isBuiltin()</a></span>。
        </td>
       </tr>

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<h2>目录</h2><ul class="chunklist chunklist_reference"><li><a href="reflectiontype.allowsnull.html">ReflectionType::allowsNull</a> — Checks if null is allowed</li><li><a href="reflectiontype.tostring.html">ReflectionType::__toString</a> — To string</li></ul>
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